Start working on the Stats Viewer application

module/utils/databases/UserFlag.mjs

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+/* eslint-disable no-unused-vars */
+import { Table } from "./model.mjs";
+
+const tablesFlag = `tables`;
+
+export class UserFlagDatabase {
+	static getTables() {
+		/** @type {Array<{ name: string; }>} */
+		const tableConfig = game.settings.get(__ID__, `tables`);
+		return tableConfig ?? [];
+	};
+
+	static createRow(table, user, row) {};
+
+	static getRows(tableId, ...users) {
+		if (users.length === 0) { users = [game.user] };
+
+		const datasets = {};
+		for (const user of users) {
+			const tables = user.getFlag(__ID__, tablesFlag) ?? {};
+			if (tables[tableId] === undefined) {
+				datasets[user.id] = null;
+				continue;
+			};
+
+			const table = new Table(tables[tableId]);
+		}
+		return datasets;
+	};
+
+	static updateRow(table, user, rowId, changes) {};
+
+	static deleteRow(table, user, rowId) {};
+};
+
+/* eslint-enable no-unused-vars */